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. (No 11101191.) 5 sheets-sheet 1.

, C. H. COOLBY.

GRAIN SCALES.

Patented Deo. 10,1889.

Inventor:

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(No Model.) n 1 5 sheets-sheet 2. C. H. COOLEY.

GRAIN SCALES.

Y 110.416,714. Patented Dec. 10, 1889.

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No. 416,714. Patented Dec. 10,1889.

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No. 416.714. Patented Dec. 1o. 1889.

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No. 416,714. Patented Dec.' 1o, 1889.

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`shown and described.

UNITED STATES PATENT OFFICE.

CHARLES H. COOLEY, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE PRATT daVHITNEY COMPANY, OF SAME PLACE.

GRAIN-SCALES.

SPECIFICATION forming part of Letters Patent No. 416,714, dated December10, 18889.

Application filed October l5, 1888. Serial No. 288,151. (No model.)

.To all whom t may concern,.-

Be it known that I, CHARLEs H. CooLEY, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inGrain-Scales,of which the following is a specification.

This invention is in the nature of an improvement on the automaticgrain-scale de scribed in my application for Letters Patent of theUnited States, Serial No. 262,850, filed February 3, 1888, Patent No.403,988, dated May 28, 1889.

In the drawings accompanying and forming a part of this specification,Figure 1 is a plan of an automatic grain-scale embodying myimprovements. Fig. 2 is a front elevation of the machine. Fig. 3 isaside elevation of the machine, which side is at the right hand in Fig.2. Fig. 4L is a rear elevation of the machine. Fig. 5 is a centralvertical'section-in a plane from front to rear through the machine,showing the principal operative parts in reverse positions to theirpositions shown in Fig. A3. Fig. 6 shows a modified construct-ion of thespeed-regulator. Fig. 7 is aside elevation of and illustrating certaindetails of the valve-operatin g devices. Fig. 8 is a plan View,partially in section, of the register or counting apparatus. Fig. 9 is afront View of the same. Fig. 10 is a partial front view of saidapparatus, illustrating the operation of the register-actuating pawl.

Similar characters designate like parts in all the igures.

The frame-work for supporting the several operative details of myimproved grainweighing machine may be substantially the same as shown inthe aforesaid application;

but I prefer the modified construction herein This frame work (shownstanding on floor F) consists in two suitable side frames 2 and et and across-frame 3, holding said frames together by joining the rear sides ofthe plates or frames 2 and 4, and supports at proper times the weightssuspended from the scale-beam. Another plate or top frame 5 joins theupper part of the side frames or uprights and serves to carry'certaindetails, hereinafter described. Other crosswise tie-rods are sometimesprovided in the larger sizes of the machines.

My improved machine comprises as principal elements thereof ascale-beam, a doublechambered oscillating bucket suspended from one endof said beam, a counterpoise or main weight supported from or on theopposite end of said beam, a supplemental weight, a discharging-hopperor supply-chute above said bucket, a counterbalanced verticallymovablereceiving-conduit below said bucket, apair of cut-off valves and devicesactuating the same from the scale-beam, and a regulator-valveoperatively connected with the said movableconduit. Not all of theseelements, however, are necessarily employed in a single machine. y

The regulator apparatus is not claimed herein, being described andclaimed in a separate application.

The scale-beam B is a frame composed of a suitable shaft and arms, andis preferably cast in a single piece. O n its under side, at the sidesthereof, the beam B has V-shaped bearings 8, which rest onthe usualknifeedges 9, duly supported on the frame-work. The usual side stops(not shown) are or may be provided to resistlateral movement of thescale-beam on its supporting knife-edges. At its rear end the scale-beamhas thereon a knife-edge 11, from and on which the weightrod 12is'suspendedby a hook 13, having therein the usual V-shaped bearing. Thelower end of rod 12 passes freely through a hole or slot 14, Fig. 5, inbeam 3. A buffer 15 is ordinarily affixed (by nuts 18') to the lower endof rod 12, to limit the upward movement of said rod and lessen the shockdue to the stoppage of the descending loaded bucket. The large or mainweight 1G, suitably xed on rod 12, `is designed to approximately balancethe grain-bucket, together with the major part of one charge or load ofgrain therein, and to furnish the force required to work the cut-offvalves. The said main weight 16 and the supplemental weight 18 togethercorrespond to the weight of grain to be weighed at a single charge orload. In practice I usually make the weight 16 witha space 58 under theAremovable cover 57, in

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which to depositl shot or other small weights to accurately adjust theweight or mass of said main weight in a well-known manner. Saidsupplemental weight rests (when the main weight is down) on the shelf 17on the plate 3, and is provided with an adjustingscrew 35. The rnainweight 16 (or the hub 32 thereof) when it rises strikes the lower end ofsaid screw 35, and thereby lifts the weight 18, and the stop-screw 35,being adjustable in weight 18, the stroke of weight 16, relativethereto, may be readily'and properly regulated. One important utility ofthis arrangement is that while the drip is completing the final loadboth weights (together with the beam) are entirely supported on theknifeedge 9, so that the adjustment of the said stop-screw can in no wayvitiate or affect the accuracy of the weighing. It will be understood,of course, that the supplemental weight is free to move on the rod 12,being itself adjustably fixed by set-screw 36 or otherwise on the hollowstop-screw or stem 35.

The usual extent of the movement of the main scale-beam is shown byFigs. 3 and 5. In Fig. 3 the position of the main beam is such that thehub 32 of weight 16 bears against stop 35, thereby lifting weight 18from its seat on frame 3, so that both weights are now supported on theknife-edges 9; but in Fig. 5 the descending movement of the rear end ofbeam B has deposited the weight 18 on the shelf 17. At its forward endthe scalebeam consists of two arms 20 22, provided respectively, withthe knife-edges 19 and 21, from and on which edges the grain-bucket issuspended. The arm 22 has at its extreme front end a weighted pawl 23,pivoted to said arm at 25 and normally lying against stop 27 5 also, avalve-stop 29, whose particular purpose and operation will behereinafter explained.

The grain-bucket, designated in a general way by G, has two similaroppositely-disposed chambers 40 42, divided by the partition or wall 37.At their lower ends said chambers are contracted in cross-sectionalarea, and terminate in spouts 39 and 41, respectively, whose lower edgesare concentric to the axis of the pivots or journals on which the bucketis supported and oscillates. These journals, which are designated by 43and 45, respectively, and are rigidly fixed on the bucket, have theirbearings in the hangers 44 46, that are suspended by means ofinverted-V-shaped bearings 47 49 from the aforesaid knife-edges 19 and2l. Said bearings 47 49, I form on the under side of the hookshapedupper ends 48 of said hangers, so that the bucket may be readily removedfrom the machine, together with the said hangers attached thereto. Belowthe journals or trunnions 43 45 the hangers are shaped to carry thebucket-closing valves or bottoms 50 52, for the respectivebucket-chambers 40 42 in their proper positions relative to each otherand to the spouts 39 and 41. On either side of the hanger and on one orboth ends of the bucket are placed fixed stops 5l 53, respectively,which serve as stops for properly limiting the oscillating movement ofthe bucket on its trunnions. In practice I face each of said abutmentswith a rubber or other yielding piece (not fully shown) to lessen thenoise and shock otherwise resulting from the blows of the bucket on saidstops or abutments. The oscillation of the bucket on its journals iseffected by the weight of the grain therein contained, and said movementis restrained or delayed until the proper moment by means of a latcharranged to engage with suitable catches on said bucket. Thebucket-latch GO is pivoted to the hanger at about the point 59, and hasa lug or projection G1 for engaging with the bucket-catches 62 G4, fixedon the bucket. A projecting end 63 on the latch on the downward movementof the bucket strikes the tripping-arm 66,-(which is connected to theframe in any convenient manner,) and thus serves to unlock the bucket.The bucket is shown tipped backward in Fig. 3 and forward in Fig. 5, inwhich cases the latch engages with catches 62 and G4, respectively. Thebucket standing, as in Fig. 5, receives its load in chamber 40, andthereby acquires a tendency to turn in the direction of arrow 68, whichtendency is for time being resisted by catch 62; but when the increasingload carries down the bucket, as in Fig. 3, the

'arm 6G raises latch G0, and thus releases the bucket, which is thencarried over to its position in this figure. The load being nowdischarged, the bucket rises and brings catch 94 into engagement withlatch (30, thereby locking the bucket in position for the loading ofchamber 42. Thus the latch operates on said catches alternately so longas the machine is in use.

Immediately above the grain-bucket the discharging hopper or spout Hisheld in place by some suitable connection with the main frame, and grainis supplied to said hopper by some suitable trough or chute. (Notshown.) A valve-shaft 72 is mounted in bearings 71 71 on the hopper H,and carries fixed thereon the arms 73 of the supplemental cut-olf valve74. Loosely mounted on said valve-shaft are other arms 75, carrying themain cut-off valve 76. The hubs of arms 73 are formed to engage (afterthe manner of clutches) with those ot' arms 75, as at 77, Fig. 2,whereby the forward movement of said valve 74 carries with it the maincut-olf valve 76 to the position shown in Fig. 5, thereby permitting afull stream of grain to ilow down into the bucket G. In Figs. 3 and 7both of said valves are shown closed. Vhen the main valve closes, itleaves only a narrow opening 78, through which the grain may slowly iiowor drip7 into the bucket to complete the charge or load to be weighed.This done the supplemental valve also closes, thus entirely cutting offthe stream of grain. For thus operating said cut-off valves I employ thesame IOO IIO

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stops.

devices as described for that purpose in Letters Patent of the UnitedStates No. 302,136, granted to J. W. Hill, July 15, 1884. Upon one orboth ends of shaft 7 2 is secured a toe 80, the upper ends of which formliftingtoes and the lower ends holding-toes or cam- These two parts maybe and are usually lformed of one piece. Evidently these toes and valve74 have the same angular movement, since all of these parts are securedon the same shaft 7 2. The pawl 23 operates to open the cut-off valveson the upward movement of the front end of beam B, as and for thepurpose fully explained in said Letters Patent and in my saidapplication. On

receiving the major part of its load of grain the bucket descends untilthe supplemental -weight 18 rests on the main weight 1b'. Meanwhile thestop 29 has descended with the beam until passing off from notch81,thereby letting the'valves swing under hopper H until stopped by thesecond notch 82 coming in contact with the said stop 29, at which timesaid cut-off valves stand, as above explained, with the main valveclosed and the supplemental valve open. The grain now continues to flow,but much more slowly, into the bucket, until the final load is receivedtherein, when the bucket overbalances the combined weights 16 and 18 anddescends, carrying stop 29 down below notch 82, and thus permittingvalve 74 to close, as in Fig. 7. During said descent pawl 23 is drawndown over the toe 80 and stands ready to again open the cut-off valveson the ascent of the main beam. This is the mode of operation describedsubstantially as in the aforesaid patent, No. 302,136, but with the aidof different reference-characters.

One part of my present invention relates to the construction of thelower end or spouts of said grain-bucket and to the construction and thecombination, with said spouts, of the adjustable speed-regulatingplates. On the outer side of each spout l cut away the wall thereof, asat 83,Fig. 5,Plate 84, held in place y by screws 89, by which theopening 39 or 41 above the closed valve 50 or 52 may be adjusted, asrequired, for adapting the machine to weigh different kinds andquantities of grain in a given time. This result is owing to theregulation of the velocity of discharge of the grain from the chambers40 and 42 by this means thevelocity of said beam movement may beregulated to produce a smooth and steady action of the machine withdifferent kinds of grain, so that a machine propmills, which must not beoversupplied. For

such uses I provide myimproved machine with an automatic regulatorsubstantially as follows: Underneath the bucket and forreceivingthegrain discharged therefrom I arrange a vertically-movableinclined conduit C, having a hopper F, of arrangement to receive thegrain discharged from the bucket. This conduit is supported at its upperend by counterbalancing the same on links 87 between the two arms 90 ofthe lever L, which lever is pivotally supported at 91 and has on therear end thereof a regulator-weight 92,0f sufficient weight to raisesaid conduit, together with a small quantity of grain therein. When theconduit C, being heavily loaded, descends by the weight of the graintherein, it acts, through a connecting-rod 56, to close aregulator-valve 95 in the hopper or chute H, and thus stop the iiow ofgrain to, and consequently the operation of, the grain-scale. The valve95 remains closed until the gradual discharge of the grain from the pipeC into the grain-receiving rmachine or chamber M, as indicated in Fig.5, permits the counter-balance to lift the said pipe and again open theregulator-valve.

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The register for counting and registering the number of loads of graindischarged by the machine is illustrated in Figs. 8, 9, and 10, in whichR is supposed to be any suitable and well-known registering apparatus,having, as usual, a series of figured wheels, seen through the openings28. The first of said wheels is on a shaft 24, that carries aten-toothed ratchet-wheel 26. The freely-pivoted pawl 30, connected at31 to the scale-beam arm 20, is constructed and arranged substantiallyas shown, so that during the downward stroke of said beam the pawl-point54 will rest lightly against the ratchet-wheel 26, and so that beforesaid stroke is completed said point 54 will drop under the tooth 55 ofsaid ratchet-wheel, as shown in Fig. 10. On the upward stroke of thebeam the said pawl then turns the ratchet, and acting through this turnsthe registerwheels to register the same load of grain which justpreviously carried down the beam.

The several features of my invention and the particular operation of thesame having now been described, the operation of the whole machine willbe understood without further description, especially since suchoperation of the old parts thereof is fully de- ISO scribed in theaforesaid patent to Hill and in the patents therein by him referred to,or in my said prior application.

Having thus described my invention, I claim- 1. In a grain-scale, thecombination of the vertically-movable grain-bu cket, one or more cut-offvalves constructed and arranged to be opened by the upwardly-movingscale-beam and a beam movement regulator in said bucket, the sameconsisting in a plate adjustably fixed in said bucket and arranged to bemoved laterally of the spout thereof to regulate the velocity ofdischarge of the outgoing grain and thereby time the movements of thescale-beam, all substantially as described.

2. In a grain-scale, the combination, With the hangers and thebucketclosers xed thereto, of the grain-bucket carried in the hangersand arranged to be swung to bring the discharge-spout thereof over saidcloser contiguous thereto, one side of said spout being formed of thelaterally-adjustable plate 84, whereby the velocity of discharge of theoutgoing grain may be regulated in order to time the movements of thescale-beam, all substantially as described.

3. In a grain-scale, the combination, with a frame-Work and thescale-beam mounted thereon, of the main Weight suspended from said beamby rod 12, the supplemental Weight having the tubular adj listing-screw35, fitting loosely on said rod, one support or shelf on the frame-Workfor the main Weight, and another support thereon for the supplementalWeight, all substantially as shown and described.

4. In a grainseale, the combination, with the side frames and the topplate and the scalebeam mounted thereon, of the crossframe 3, having thelower support for the main Weight and the upper support for thesupplemental Weight, of the rod l2, suspended from said beam and havingthe main Weight fixed thereon, and the supplemental Weight having anadjusting-screw, substantially as described, and carried freely on saidrod above said upper support, all constructed and arranged substantiallyas shown and described.

CHARLES H. COOLEY. Witnesses:

FRANCIS H. RICHARDS, SAML. W. PoWEL.

